HI "Globals are not inserted into the Working Memory, and therefore a global should never be used to establish conditions in rules except when it has a constant immutable value. The engine cannot be notified about value changes of globals and does not track their changes" It is what mentioned in documentation about "globals"!!! Is there any detailed documentation or examples where "globals" were used in such a context mention above Thank you Joy -- View this message in context: http://drools.46999.n3.nabble.com/Local-Variable-tp4020144p4020149.html Sent from the Drools: User forum mailing list archive at Nabble.com.

Hi If am declaring a map as global variable. global java.util.Map map In the "then" part of rule 1 am putting a key n value into map Is it possible to get the value using the key from the "then" part of rule 2? Do i want to update,insert like any thing on global variable? or How is it possible for rule engine to identify the changes in global variable tht shud be reflected on other rule! Regards joy -- View this message in context: http://drools.46999.n3.nabble.com/Local-Variable-tp4020144p4020173.html Sent from the Drools: User forum mailing list archive at Nabble.com.

Another approach would be to use a transient Fact for the "local variable":- rule "1" when #some condition01 then insertLogical( new MyFact(200) ); end rule "2" when #some condition02 then insertLogical( new MyFact(300) ); end rule "3" when #some condition03 MyFact( $v : value ) then emp.salary=$v+2000 end Of course if Rule "1" and Rule "2" both inserted an instance of MyFact Rule "3" would activate twice. This can be safe-guarded against by checking for the non-existence of MyFact:- rule "1" when #some condition01 not MyFact() then insertLogical( new MyFact(200) ); end rule "2" when #some condition02 not MyFact() then insertLogical( new MyFact(300) ); end rule "3" when #some condition03 MyFact( $v : value ) then emp.salary=$v+2000 end If however you then needed this to work on, for example different employees, you'd need to associated MyFact to the employee:- rule "1" when $e : Employee( position == "grunt" ) not MyFact( employee == $e ) then insertLogical( new MyFact(200, $e) ); end rule "2" when $e : Employee( position == "manager" ) not MyFact( employee == $e ) then insertLogical( new MyFact(300) ); end rule "3" when $e : Employee( position == "grunt" ) MyFact( $v : value, employee == $e ) then modify($e) { setSalary( $v+2000) } end On 5 October 2012 12:46, joy <Kripa_M01(a)infosys.com&gt; wrote:

You will be able to set or get a property on an instance of the declared fact. On Oct 5, 2012 6:03 PM, "Devan Van Reenen" <devan.vanreenen(a)gmail.com&gt; wrote:

Just to add another option: A variable to set in one and to use in another consequence can also be a static field in some Java class, with (or without - huh!) setter and getter. However, no matter which technique one chooses, setting such a variable in rule A and using its value in rule B creates two dependencies: - the temporal dependency that rule A must execute before rule B - the logical dependency that an execution of rule A with some specific set of facts must "match" the execution of rule B; in other words, one needs to make sure that there is no confusion among multiple executions of rule A and rule B. Only a dynamically created object, inserted logically or not, has a chance to handle these dependencies, with fields in addition to the "value" to be passed on identifying the context, i.e., one or more facts participating in the firing of A. Anything else is playing with fire. -W On 05/10/2012, Davide Sottara <dsotty(a)gmail.com&gt; wrote: